In my opinion (and mine only
), the luck scale is simply sub-par to the order scale.
Even with luck+3, you only have a 80% chance of a random event being a good one... that means that every fifth event is a bad one. Since bad events are usually much worse than average good events, I usually go for order scale to reduce the amount of events at all happening to me - I am more scaerd of floods killing of my population than looking forward to getting a random magic item and a couple of gold for free, as well in early as in late game.